Erica is exactly right about the tile roofs.
I hope you're coping with the heat!
Coldwell Banker Trails and Paths
Phil at RWC is a pretty sharp materials guy and could probably answer your question if you are really looking for an answer verses simply commenting about our weather. His email address is: email@example.com.
I for one would be interested in hearing what he has to say so if you chat with him let us know what he has to say.